OAK PARK, IL · Cook County
OAK PARK Water System
Current status
No open violations on record as of July 4, 2026.
This system's next federally required Consumer Confidence Report is due July 1, 2027, under the EPA's revised reporting rule.
Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed July 4, 2026. This is a record-keeping and public-information tool — it does not replace Illinois’s official records. Always confirm current status with Illinois before making decisions based on this information.
System facts
- System ID (PWSID)
- IL0312250
- System type
- Community Water System
- Population served
- 54,583
- Service connections
- 12,683
- Ownership
- local government
- Water source
- surface water (rivers, lakes, or reservoirs)
Violation history
Water Quality Parameter M/R
—Lead and Copper Rule
January 1, 1997 – March 31, 1997
ResolvedPublic Education
Health-basedLead and Copper Rule
January 1, 1994 – February 5, 1995
ResolvedInitial Tap Sampling for Pb and Cu
—Lead and Copper Rule
January 1, 1994 – September 23, 1993
ArchivedInitial Tap Sampling for Pb and Cu
—Lead and Copper Rule
July 1, 1993 – September 23, 1993
ArchivedWater Quality Parameter M/R
—Lead and Copper Rule
July 1, 1992 – December 31, 1992
Resolved
Resolved addressed and confirmed by the stateArchived closed in EPA's records (typically due to age or a data correction)
| Period | Violation | Contaminant / rule | Health-based | Status |
|---|---|---|---|---|
| January 1, 1997 – March 31, 1997 | Water Quality Parameter M/R | Lead and Copper Rule | — | Resolved |
| January 1, 1994 – February 5, 1995 | Public Education | Lead and Copper Rule | Health-based | Resolved |
| January 1, 1994 – September 23, 1993 | Initial Tap Sampling for Pb and Cu | Lead and Copper Rule | — | Archived |
| July 1, 1993 – September 23, 1993 | Initial Tap Sampling for Pb and Cu | Lead and Copper Rule | — | Archived |
| July 1, 1992 – December 31, 1992 | Water Quality Parameter M/R | Lead and Copper Rule | — | Resolved |
Resolved addressed and confirmed by the stateArchived closed in EPA's records (typically due to age or a data correction)
Enforcement actions
- April 16, 1999State Compliance achieved2 linked violations
- February 5, 1995State Compliance achieved1 linked violation
- January 3, 1994State Compliance achieved1 linked violation
- January 3, 1994State Compliance achieved1 linked violation
- September 23, 1993State Compliance achieved1 linked violation
- October 1, 1988State Public Notification requested1 linked violation
Contact
DUFFY, ERIN
708-358-5704
OAK PARK, IL 60302